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ARM: SoC: convert Exynos4 to SMP operations

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Convert Exynos4 to use struct smp_operations to provide its SMP
and CPU hotplug operations.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Acked-by: Nicolas Pitre <nico@linaro.org>
Tested-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Marc Zyngier 2011-09-08 13:15:22 +01:00 committed by Arnd Bergmann
parent a17257322f
commit 06853ae475
10 changed files with 33 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
arch/arm/mach-exynos/common.h
View File

@ -14,6 +14,7 @@
extern struct sys_timer exynos4_timer;
struct map_desc;
void exynos_init_io(struct map_desc *mach_desc, int size);
void exynos4_init_irq(void);
void exynos5_init_irq(void);
@ -59,4 +60,8 @@ void exynos4212_register_clocks(void);
#define exynos4212_register_clocks()
#endif
extern struct smp_operations exynos_smp_ops;
extern void exynos_cpu_die(unsigned int cpu);
#endif /* __ARCH_ARM_MACH_EXYNOS_COMMON_H */

18
arch/arm/mach-exynos/hotplug.c
View File

@ -21,6 +21,8 @@
#include <mach/regs-pmu.h>
#include "common.h"
extern volatile int pen_release;
static inline void cpu_enter_lowpower(void)
@ -95,17 +97,12 @@ static inline void platform_do_lowpower(unsigned int cpu, int *spurious)
}
}
int platform_cpu_kill(unsigned int cpu)
{
return 1;
}
/*
* platform-specific code to shutdown a CPU
*
* Called with IRQs disabled
*/
void platform_cpu_die(unsigned int cpu)
void __ref exynos_cpu_die(unsigned int cpu)
{
int spurious = 0;
@ -124,12 +121,3 @@ void platform_cpu_die(unsigned int cpu)
if (spurious)
pr_warn("CPU%u: %u spurious wakeup calls\n", cpu, spurious);
}
int platform_cpu_disable(unsigned int cpu)
{
/*
* we don't allow CPU 0 to be shutdown (it is still too special
* e.g. clock tick interrupts)
*/
return cpu == 0 ? -EPERM : 0;
}

1
arch/arm/mach-exynos/mach-armlex4210.c
View File

@ -199,6 +199,7 @@ static void __init armlex4210_machine_init(void)
MACHINE_START(ARMLEX4210, "ARMLEX4210")
/* Maintainer: Alim Akhtar <alim.akhtar@samsung.com> */
.atag_offset = 0x100,
.smp = smp_ops(exynos_smp_ops),
.init_irq = exynos4_init_irq,
.map_io = armlex4210_map_io,
.handle_irq = gic_handle_irq,

1
arch/arm/mach-exynos/mach-exynos5-dt.c
View File

@ -79,6 +79,7 @@ static char const *exynos5250_dt_compat[] __initdata = {
DT_MACHINE_START(EXYNOS5_DT, "SAMSUNG EXYNOS5 (Flattened Device Tree)")
/* Maintainer: Kukjin Kim <kgene.kim@samsung.com> */
.init_irq = exynos5_init_irq,
.smp = smp_ops(exynos_smp_ops),
.map_io = exynos5250_dt_map_io,
.handle_irq = gic_handle_irq,
.init_machine = exynos5250_dt_machine_init,

1
arch/arm/mach-exynos/mach-nuri.c
View File

@ -1383,6 +1383,7 @@ static void __init nuri_machine_init(void)
MACHINE_START(NURI, "NURI")
/* Maintainer: Kyungmin Park <kyungmin.park@samsung.com> */
.atag_offset = 0x100,
.smp = smp_ops(exynos_smp_ops),
.init_irq = exynos4_init_irq,
.map_io = nuri_map_io,
.handle_irq = gic_handle_irq,

1
arch/arm/mach-exynos/mach-origen.c
View File

@ -806,6 +806,7 @@ static void __init origen_machine_init(void)
MACHINE_START(ORIGEN, "ORIGEN")
/* Maintainer: JeongHyeon Kim <jhkim@insignal.co.kr> */
.atag_offset = 0x100,
.smp = smp_ops(exynos_smp_ops),
.init_irq = exynos4_init_irq,
.map_io = origen_map_io,
.handle_irq = gic_handle_irq,

2
arch/arm/mach-exynos/mach-smdk4x12.c
View File

@ -370,6 +370,7 @@ static void __init smdk4x12_machine_init(void)
MACHINE_START(SMDK4212, "SMDK4212")
/* Maintainer: Kukjin Kim <kgene.kim@samsung.com> */
.atag_offset = 0x100,
.smp = smp_ops(exynos_smp_ops),
.init_irq = exynos4_init_irq,
.map_io = smdk4x12_map_io,
.handle_irq = gic_handle_irq,
@ -383,6 +384,7 @@ MACHINE_START(SMDK4412, "SMDK4412")
/* Maintainer: Kukjin Kim <kgene.kim@samsung.com> */
/* Maintainer: Changhwan Youn <chaos.youn@samsung.com> */
.atag_offset = 0x100,
.smp = smp_ops(exynos_smp_ops),
.init_irq = exynos4_init_irq,
.map_io = smdk4x12_map_io,
.handle_irq = gic_handle_irq,

2
arch/arm/mach-exynos/mach-smdkv310.c
View File

@ -417,6 +417,7 @@ MACHINE_START(SMDKV310, "SMDKV310")
/* Maintainer: Kukjin Kim <kgene.kim@samsung.com> */
/* Maintainer: Changhwan Youn <chaos.youn@samsung.com> */
.atag_offset = 0x100,
.smp = smp_ops(exynos_smp_ops),
.init_irq = exynos4_init_irq,
.map_io = smdkv310_map_io,
.handle_irq = gic_handle_irq,
@ -429,6 +430,7 @@ MACHINE_END
MACHINE_START(SMDKC210, "SMDKC210")
/* Maintainer: Kukjin Kim <kgene.kim@samsung.com> */
.atag_offset = 0x100,
.smp = smp_ops(exynos_smp_ops),
.init_irq = exynos4_init_irq,
.map_io = smdkv310_map_io,
.handle_irq = gic_handle_irq,

1
arch/arm/mach-exynos/mach-universal_c210.c
View File

@ -1155,6 +1155,7 @@ static void __init universal_machine_init(void)
MACHINE_START(UNIVERSAL_C210, "UNIVERSAL_C210")
/* Maintainer: Kyungmin Park <kyungmin.park@samsung.com> */
.atag_offset = 0x100,
.smp = smp_ops(exynos_smp_ops),
.init_irq = exynos4_init_irq,
.map_io = universal_map_io,
.handle_irq = gic_handle_irq,

20
arch/arm/mach-exynos/platsmp.c
View File

@ -32,6 +32,8 @@
#include <plat/cpu.h>
#include "common.h"
extern void exynos4_secondary_startup(void);
#define CPU1_BOOT_REG (samsung_rev() == EXYNOS4210_REV_1_1 ? \
@ -64,7 +66,7 @@ static void __iomem *scu_base_addr(void)
static DEFINE_SPINLOCK(boot_lock);
void __cpuinit platform_secondary_init(unsigned int cpu)
static void __cpuinit exynos_secondary_init(unsigned int cpu)
{
/*
* if any interrupts are already enabled for the primary
@ -86,7 +88,7 @@ void __cpuinit platform_secondary_init(unsigned int cpu)
spin_unlock(&boot_lock);
}
int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle)
static int __cpuinit exynos_boot_secondary(unsigned int cpu, struct task_struct *idle)
{
unsigned long timeout;
@ -161,7 +163,7 @@ int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle)
* which may be present or become present in the system.
*/
void __init smp_init_cpus(void)
static void __init exynos_smp_init_cpus(void)
{
void __iomem *scu_base = scu_base_addr();
unsigned int i, ncores;
@ -184,7 +186,7 @@ void __init smp_init_cpus(void)
set_smp_cross_call(gic_raise_softirq);
}
void __init platform_smp_prepare_cpus(unsigned int max_cpus)
static void __init exynos_smp_prepare_cpus(unsigned int max_cpus)
{
if (!soc_is_exynos5250())
scu_enable(scu_base_addr());
@ -198,3 +200,13 @@ void __init platform_smp_prepare_cpus(unsigned int max_cpus)
__raw_writel(virt_to_phys(exynos4_secondary_startup),
CPU1_BOOT_REG);
}
struct smp_operations exynos_smp_ops __initdata = {
.smp_init_cpus = exynos_smp_init_cpus,
.smp_prepare_cpus = exynos_smp_prepare_cpus,
.smp_secondary_init = exynos_secondary_init,
.smp_boot_secondary = exynos_boot_secondary,
#ifdef CONFIG_HOTPLUG_CPU
.cpu_die = exynos_cpu_die,
#endif
};